1994-2003 Powerstroke 7.3L Gator Fasteners HD Head Stud Kit (HSK73)1994 2003 Powerstroke 7. 3L Gator Fasteners HD Head Stud Kit (HSK73) These studs have a much higher strength and will not stretch like the factory bolts will. The Gator Fasteners Performance Head Studs are a Heavy Duty stud designed for stock to built 7. 3L Power Stroke engines. Gator Fasteners Heavy Duty Head Studs are design to hold up to the pressure of your 7. 3L whether you're building a tow rig, race truck or just a daily driver.